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Finding the Fourth Proportional to 900.05, 1,240.83 and 676.29

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Solution

The fourth proportional to 900.05, 1,240.83 and 676.29 is: 932.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.05 : 1,240.83 = 676.29 : x
  2. Step 2: Convert to fraction form
    900.05/1,240.83 = 676.29/x
  3. Step 3: Cross multiply
    900.05x = 1,240.83 × 676.29
  4. Step 4: Simplify right side
    900.05x = 839,160.92
  5. Step 5: Solve for x
    x = 839,160.92/900.05
  6. Step 6: Final answer
    x = 932.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.